Improvement in heat-regulators for hot-air furnaces



A.- H.. TINGLEY. Heatfegula'to'r forV Hot Air Furnaces.

0.168,297, Patented Sept'.'2'8,1875.

T0 SMOKE FLUE 'UNITED STATE-s- PATENT OFFICE.

ALBERT B. TINGLEY, 0E PROVIDENCE, RHODE IsLAND.

IMPROVEMENT IN HEAT-REGULATORS FOR HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 168.297, dated September 28, 1875 application filed May 13, 1875.

To all whom it may concern Beit known that I, ALBERT H. TINGLEY, of Providence, in the State of Rhode Island, have invented certain new and useful Improvements in Automatic Heat- Regulators for Hot-Air Furnaces&c.; a'nd I do hereby` declare that the following specification, 'taken in connection with the drawing, making a part of the same, is a full, clear, and exactdescription thereof. Y

Figure lis a view of the apparatus, with improvements attached. Fig. 2 is a view of the damper. Fig. 3 is a horizontal section of damper, showing outer and inner shell.

My invention lconsists in certain improvements in the apparatus for regulating hot-air furnaces, Ste., for which Letters Patent were granted me October 30, 1866, and February -l5, 1870. hereinafter described.

situated; and such change in volume, being accompanied by movement vcausing pressure upon one side or the other of a sensitive diaphragm, induces changes in the position of the valve which governs the admission of draftair to the fire-box of the furnace.

In many furnaces, especially those that have been hong in use, the admission of draftair to the lire-box cannot be completely controlled by the valve within the draft-pipe, but on the contrary a considerable quantity will find its way to the fire-box through cracks and loose joints, thus in a measure rendering the apparatus inoperative.

A, Fig. 1, represents the vessel which is located within the hot-air chamber of a furnace. B is a like vessel, so located as to be exposed to the cold air; and a the pipe connecting the two vessels. Gis an enlargement of a branch from the pipe a, containing the diaphragm. 7 Dis the draft-pipe, within which is the valve which regulates the admission of For this purpose I connect with the smokeue a pipe, E, extending downward beyond 4the top of, and parallel with the draft-air pipe I), and in close proximity thereto. The pipe E is open at the lower end, and near its extremity is provided with a valve attached to the elongated axis of the valve within the draft-air pipe D, but at right angles thereto.

It will now be readily seen that as one valve closes the other opens, and vice versa, so that when the valve in the draft-air pipe D is closed the valve in the pipe E will be open, thus establishing a direct, draft to the iiue above the fire, and eifectuall;T cutting off the introduction of draft-air through the cracks and joints of the furnace.

In case the Hue-pipe E is not required it may be closed at the bottom in any couvenient way.

What I claimv as my invention, and desire to secure by Letters Patent, is-

Ihe draft-air pipe D', due-pipe E, and compound `damper F, operating in combination with the hot and cold air vessels A B, and communicating pipes,l diaphragm, and lever, substantially as and for the purpose set forth.

ALBERT H. 'JINGrLFLv Witnesses:

ALBERT D. BEAN, MILTON H. SHATTUGK.

to the fire-box. 

